re PR libgcj/49451 (FileHandleGcTest FAILS on IRIX)

re PR libgcj/49451 (FileHandleGcTest FAILS on IRIX)

	PR libgcj/49451
	* include/private/gcconfig.h [IRIX5 && _MIPS_SZPTR == 64]
	(ELF_CLASS): Define.
	* dyn_load.c [IRIX5]: Include <elf.h>.
	Include <obj.h> for O32, <objlist.h> for N32, N64.
	[SUNOS5DL && USE_PROC_FOR_LIBRARIES] (obj_offset): Define.
	[SUNOS4 && USE_PROC_FOR_LIBRARIES] (obj_offset): Define.
	[IRIX5 && !USE_PROC_FOR_LIBRARIES] (struct link_map): Define.
	(__rld_obj_head): Declare.
	(l_next, l_addr, obj_offset): Define.
	(GC_FirstDLOpenedLinkMap): New function.
	[SUNOS4 || SUNOS5DL] (GC_register_dynamic_libraries): Also use on
	IRIX5.
	Use obj_offset.
	[IRIX5 || (USE_PROC_FOR_LIBRARIES && !LINUX]
	(GC_register_dynamic_libraries): Don't use /proc version on IRIX5.

From-SVN: r175623